Provision of Design & Build Project Implementation Services Including Capacity Building and Impact Evaluation for the Proposed Drinking Water Supply System Improvement Project in
Barchi Area of Kabul City, Afghanistan
LOCATIONKabul Province of Afghanistan
United Nations Office for Project Services (UNOPS)
Afghanistan Operations Centre (AFOC)
DURATION OF ASSIGNMENT14 Months
START DATE / COMPLETION DATE
14 Oct, 2018
30 Nov, 2019
UNOPS has engaged DV to ‘design and build’ the proposed drinking water supply system and to offer hygiene promotion and capacity building to the Beest Hazzari community and staff of relevant local authorities.
It is envisaged that four x 400 mm diameter boreholes will be drilled to a depth of around 200 metres (this is a non-binding basic assumption, and need to be validated by the DV in view of the recent Hydrogeological Survey and pumping tests); the exact diameters and depths of the bore wells will be known after the assessment and during the design stage of the Project (Phase 1).
Each borehole shall have its own Water Plant/ pump station comprising a submersible pump and a building housing electricity generator, chlorination equipment and other related services as detailed below. DV is required to review and validate project initial technical studies and surveys and to carryout additional technical and topographical surveys needed for the design covering all factors surrounding the water sources in the four designated locations, for drilling of the deep water wells, construction of Water Plants, elevated water tanks and piped network scheme shall be conducted under phase 1 of this Contract.
As power supply in Kabul is erratic, the use of diesel fuelled backup generators will be considered in order to ensure continuity of supply; DV shall prepare design of the Water Plants including official electricity connections, the generators rooms as detailed below. One generator need to be provided for each borehole site; DV shall prepare the exact specifications of the generators in accordance with water pumps and boreholes requirements. The Afghanistan Urban Water Supply and Sewerage Corporation (AUWSSC) will be responsible for fuel and maintenance after the Project is completed.
A reinforced concrete elevated tank/water tower is proposed for each borehole site, the DV has to prepare the sizing, elevation as well as the detailed structural designs of these towers and tanks in according with given standards. Water quality testing has been conducted recently to the existing boreholes in the site, and the results are attached. DV however, will validate these results by conducting confirmatory assessment and testing mainly for the bacteriological water content, the results of these tests will provide direction as to which disinfection/chlorination, are to be undertaken at the pump stations before supplying water to users. The water quality testing should comply with National Water Quality Standard and the relevant WHO guidelines for drinking water quality.
The water reticulation proposal comprises approximately 29 kilometres of gravity pipelines from the assumed, four elevated storage tanks to the houses; however, the exact length of the network will be known after completion of the surveys and designs. Results of the recently conducted pumping tests in the same locality and in adjacent areas are attached and shall be taken into consideration. Additional pumping tests need to be carried out as part of the development of the new boreholes under this project to estimate the deliverable quantity of water as well as assessing the mutual impact among existing water wells in the surrounding area and the new wells. DV shall review and validate the given water capacity analysis against the demand and the provided pump test results and should share the conclusions with UNOPs under phase 1 and before going for draft and detailed design of the water supply system including sources, storage, disinfection, network etc…
The Project aims at supplying drinking water to the present 2,200 households with a minimum head of 15 meters at the ground level of each household and a supply level of 60 litres per capita, per day. The water supply is to be available 24 hours per day all year round. Each household connection will be metered and the household charged for the service by the AUWSSC based on the agreed water tariff mechanism. The project need to consider population growth during the next 15 years set as a Design Horizon as well as the forecast in the trend for increasing the per capita water demand, that should be followed by detailed design and full implementation of the required water supply system. To meet the requirements beyond the design horizon period, DV is to propose a phasing expansion and upgrade in the system to meet future needs. Such proposal for the longer term expansion need to be formulated in broad specifications and costing without detailed designs at this stage.
A Shura (town water council) shall be established in order to address any issue that may arise and to act as a liaison between the Project and the Community. Standard water tariffs for the Project must be proposed by DV based on financial analysis of costs and need to be agreed with the Government and the Community, and shall be applied post-handover. Currently, rates demanded by the private sector are higher than the city median, reasonable tariffs are supposed to be introduced and the money gained from tariffs will be used for maintenance and repairs by the Afghanistan Urban Water Supply and Sewerage Corporation (AUWSSC).
Before finalizing phase 1, DV need to show case of the project marketability and viability through a comparative study between current and future conditions elaborating on water availability, quality, quantity and cost for end beneficiaries among other factors. The implementation of physical works may only start once the designs and plans are approved by UNOPS Project Manager. DV is required to implement full civil works, source developments, water supply network and all related requirements in accordance with the Contract specifications and schedules and in full compliance with UNOPS environmental and gender policies. The Project need to adopt as applicable the UNOPS Design Planning Manual and the UNOPS Project Implementation Document (PID). UNOPS quality assurance team will be conducting quality audits during each stage of the Project implementation.